Anglo-Spanish War (1585–1604)

The Anglo-Spanish War (1585–1604) was an intermittent conflict between Habsburg Spain and the Kingdom of England that was never formally declared. It began with England's military expedition in 1585 to what was then the Spanish Netherlands under the command of Robert Dudley, Earl of Leicester, in support of the Dutch rebellion against Spanish Habsburg rule.

In large-scale campaigns, the English repelled the Spanish Armada in 1588, while Spain repelled the English Armada in 1589. The war included much English privateering against Spanish ships, and several widely separated battles. The war dragged on towards the end of the sixteenth century; England and Spain intervened in France in the 1590s and in Ireland from 1601. The campaign in the Netherlands saw a Spanish veteran force defeated by the Anglo-Dutch at the Battle of Nieuwpoort in 1600. This was followed a year later by the costly three-year Siege of Ostend, which Spain eventually seized.

The war was brought to an end in August 1604 with the Treaty of London between the new kings: Philip III of Spain and James I of England. In the treaty, England and Spain restored the status quo ante bellum, agreed to cease their military interventions in the Netherlands and Ireland respectively, and resumed trade; the English ended their high seas privateering and the Spanish recognized James as king.